Crowborough, East Sussex
Bungalow rear extension in Crowborough
We plan and build rear extensions for bungalows for homeowners in Crowborough. Single-storey rear extensions that keep everything on one level. Start with a free site visit, then a written price once the design is agreed.
Crowborough and its postcode districts TN6 are part of our East Sussex coverage. For Crowborough bungalows we design the roof first, because the low eaves decide the height of the new room.
Book a free site visit
Tell us about the house and we'll call to arrange a free, no-obligation visit.
How much does a bungalow rear extension cost in Crowborough?
In Crowborough, our guide for a bungalow rear extension is £2,070–£3,360 per square metre including VAT for a standard specification. South East prices run above our West Midlands baseline, mainly on labour rates and clay-soil foundations.
| Size | Guide price inc VAT |
|---|---|
| 3 m wide × 4 m deep (12 m²) | £25,000–£40,500 |
| 4 m wide × 6 m deep (24 m²) | £49,500–£80,500 |
These are guide ranges; the written quote after the survey is the figure that counts.
Do you need planning permission for a bungalow rear extension in Crowborough?
The planning route for a bungalow rear extension in Crowborough is set by England's householder rules and your council.
English permitted development (Class A) allows a single-storey rear extension of 3 metres on a terraced or semi-detached house and 4 metres on a detached one, measured from the original house, with a maximum height of 4 metres and eaves of no more than 3 metres within 2 metres of a boundary.
If 3 or 4 metres is not enough, England's prior approval route allows 6 metres on a terraced or semi-detached house and 8 metres on a detached house for a single-storey rear extension. Neighbours are consulted, the council decides within 42 days, and the fee is £249, rising to £310 from 8 December 2026.
Conservation areas, National Parks, National Landscapes and the Broads restrict permitted development, and listed buildings always need listed building consent. Before any drawing we look up the property's history with the council, because earlier extensions and removed rights change the answer.
What are homes in Crowborough like to extend?
Commuter semis and detached houses make up much of Crowborough, and longer gardens make England's prior approval route for deeper rear extensions worth considering.
How a bungalow rear extension in Crowborough comes together
Look round and measure
A free visit to see the back of the house, measure it, check the drains and boundaries and hear what you need.
Drawings and budget
Floor plans and elevations for the options, each with a guide price.
Paperwork handled
Planning, prior approval or permitted development, Building Regulations approval, structural design and party wall notices are all handled by us.
Fixed price and build
A written price for the agreed design, a start date and a named contact through the build, ending with the building control completion certificate.
Bungalow rear extensions near Crowborough
Neighbouring places we cover include Royal Tunbridge Wells (6.6 miles) and Uckfield (7.0 miles).
- Bungalow rear extension in Royal Tunbridge Wells
- Bungalow rear extension in Uckfield
- Bungalow rear extension in East Grinstead
- Bungalow rear extension in Tonbridge
- Bungalow rear extension in Hailsham
Other work in Crowborough:
FAQ
Bungalow rear extension questions in Crowborough
Is the site visit in Crowborough free?
Yes. We visit, measure up and talk through the options with no cost and no obligation.
Do I need a party wall agreement?
In England, usually yes if the extension is on or near a shared boundary or the foundations are close to a neighbour's building. We serve the notices.
Can a bungalow extension be fully accessible?
Yes: level thresholds, wider doors and a wet room are straightforward to design in.
How much does a bungalow rear extension cost in Crowborough?
As a guide, £2,070–£3,360 per square metre including VAT for a standard specification. For example, 3 m wide × 4 m deep (12 m²): about £25,000–£40,500 at that rate. Your written price follows the survey.
Can I live at home while the extension is built?
Usually yes. Most of the work is outside until the back wall is opened near the end, and that stage is screened off.
Will I need a structural engineer?
Yes for the beam over the new opening and usually the foundations; we arrange them and their calculations go to building control.